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Water and Environment :: Environmental Planning and Compliance

Tualatin Basin Water Supply Program Environmental Planning and Permitting

Washington County, OR

The Tualatin Basin Water Supply Project (TBWSP) is an investment in the health and sustainability of the region’s watershed, economy, and community. Clean Water Services’ vision for “dependable, safe and secure fresh water to ensure the long-term economic health and livability” of the region is paramount.

From 2003 through mid-2012, DEA worked with Clean Water Services and the Water Supply Partners to provide environmental planning and permitting assistance for the TBWSP. As part of this effort, DEA prepared a Draft Planning Report/Environmental Impact Statement with the U.S. Bureau of Reclamation as the lead federal agency. The water supply alternatives included raising the existing Scoggins Dam at Henry Hagg Lake, constructing a pipeline to an existing water treatment plant, and providing a multiple-source option that included a Willamette River pipeline. Areas of particular concern included potential impacts to wetlands, fish and wildlife habitat, water quality, and recreation.

DEA also assisted with preliminary environmental permitting and mitigation discussions with the tribes and local, state, and federal resource agencies. Through a collaborative environmental process, the DEA team brought together the diverse interests to set the stage for successful permitting of the TBWSP. In addition, DEA developed an innovative, environmental functions-based approach to mitigation planning with the intent of meeting Clean Water Services’ holistic approach to meeting its basin-wide conservation goals.


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